Three-Dimensional and Plane Stress Constitutive Models and Algorithms for Reinforced Concrete Plate and Shell Structures Incorporating Anisotropic Damage Mechanisms and Viscous Regularization Effects.

摘要

The analysis of reinforced concrete structures presents numerous challenges to the structural analyst. Essential prerequisites to performing effective calculations of reinforced concrete behavior include: (1) Constitutive relations that accurately model the damage incurred by the concrete during crushing and cracking; (2) Robust theories and numerical implementations that can capture strain softening; and (3) An efficient methodology to model reinforcement. Three dimensional and plane stress constitutive theories and algorithms are presented for reinforced concrete plate and shell structures. Anisotropic damage mechanisms are incorporated for representing the sundry failure modes exhibited by reinforced concrete subjected to intense dynamics loadings. Viscous regularization is employed for the representation of rate-dependent effects entailed by high rates of loading, and to mitigate numerical difficulties, such as spurious mesh sensitivity, brought about by strain softening behavior. Multiple failure surface theories and algorithms are also presented so that the present work can be applied to popular models appearing in the literature.